Class-D−1 Power Amplifier Using Cavity Filtering Balun for All-Digital RF Transmitters

Yuanchun Li, Jialin Huang, Qixiong Chen, Jinchao Mou, Xinyu Zhou, Quan Xue

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

This letter presents a novel Class- D−1 power amplifier (PA) based on a dielectric filled cavity balun. Different from the conventional Class-D PA, the functions of signal combination, filtering, and output impedance matching are all integrated into the high Q filtering balun. This method not only provides a high efficiency and sharp roll-off for noise shaping but also reduces the design complexity. The effect of Cds on efficiency is also analyzed. A simple neutralizing network is used to obtain additional efficiency enhancement. For demonstration, a filtering Class- D−1 PA operating at 1.82 GHz is fabricated and measured. With the measured result, the proposed PA shows an output power of 41 dBm and a drain efficiency of 71.8% with a high-frequency selectivity.
Original languageEnglish
Article number10004847
Pages (from-to)327-330
Number of pages4
JournalIEEE Microwave and Wireless Components Letters
Volume33
Issue number3
DOIs
Publication statusPublished - 2 Jan 2023
Externally publishedYes

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